JP2573691B2 - Paper sheet separation and feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a paper sheet separating and feeding device incorporated in an automatic depositing / dispensing machine, an optical reader, or the like, and more specifically, a banknote or a document stored in a storage unit. Alternatively, the present invention relates to a sheet separating and feeding device having a structure in which sheets such as sheets (hereinafter referred to as sheets) are separated and fed one by one by cooperation of a plurality of types of rollers that rotate so as to have different feeding directions. .

[Conventional technology]

FIG. 5 is a perspective view showing a conventional paper sheet feeding apparatus of this type. In FIG. 5, reference numeral 1 denotes a storage section, which has a guide plate section 2 at a front end, and a bottom section which can move up and down. It is stage 3.

Reference numeral 4 denotes paper sheets stored in the storage unit 1 in a form accumulated on the stage 3.

Reference numeral 5 denotes a pickup roller, which has a high friction member 6 on a part of the outer periphery. For example, two pickup rollers 5 are fixed to the shaft 7 at a predetermined interval.
It is arranged on the upper side and is rotated in the direction of arrow a by a transport motor described later.

Reference numeral 8 denotes a feed roller, which has a high friction member 9 on a part of the outer periphery similarly to the pickup roller 5, and has, for example, two ring-shaped grooves 10 extending in the entire circumferential direction.

For example, two feed rollers 8 are fixed at a predetermined interval to a shaft 11 provided in parallel with the shaft 7, and the storage unit 1 is positioned on the guide plate 2.
, And similarly rotates in the direction of arrow a in conjunction with the rotation of the pickup roller 5.

Here, the stage 3 of the storage unit 1 is urged upward by a spring or a drive mechanism (not shown), whereby the stage 3 is raised and the uppermost sheet 4 is pressed against the pickup roller 5. .

The high friction members 6, 9 provided on the pickup roller 5 and the feed roller 8 have a sufficient frictional force to feed and feed the paper sheet 4.

A separation roller 12 has, for example, one ring-shaped groove 13 extending over the entire circumferential direction.

The separation roller 12 is attached to a shaft 15 rotatably held by a holding block 14 located below the guide plate 2 so as to be at the same interval as the feed roller 8. A part of the outer periphery protrudes from the provided through hole to the upper surface side, and the feed roller 8 and the grooves 10 and 13 of each other.
Slightly engaged.

A one-way clutch (not shown) is provided between the separation roller 12 and the shaft 15, and the separation roller 12 pushes the paper sheet 4 back to the storage portion 1 as shown by an arrow b by a motor (not shown). And the frictional force of the separation roller 12 against the paper sheet 4 is set to be smaller than the frictional force of the feed roller 8 against the paper sheet 4.

16 is a pulley attached to one end of the shaft 7,
17 is a pulley attached to one end of the shaft 11, 18
Is a belt wound around the pulleys 16 and 17, and the shaft 11 and the feed roller 8 rotate in conjunction with the shaft 7 and the pickup roller 5 via the pulleys 16 and 17 and the belt 18.

19 is a pulley attached to the shaft 7 adjacent to the pulley 16, 20 is a clutch, 21 is a pulley attached to the output shaft of the clutch 20, 22 is a brake, and 23 is an output shaft of the brake 22. The pulley 24 is a belt wound around these three pulleys 19,21,22.

25 is a pulley attached to the input shaft of the clutch 20, 26 is a transport motor, 27 and 28 are pulleys attached to the transport motor 26 so as to be adjacent to each other, and 29 is wound around the pulley 25 and the pulley 27. The belt 30 is a belt wound around a pulley 28 of a transport system (not shown) that transports the paper sheet 4 fed from the storage section 1 and the pulley 28, and the pulleys 27 and 28 are transport motors 26. By arrow d
Rotate in the direction.

31 is a pulley attached to the output shaft of the brake 22 adjacent to the pulley 23, 32 is a return motor, 33 is a clutch having an input shaft attached to the return motor 32, and 34 is an output shaft of the clutch 33. The pulley 34 is rotated by the return motor 32 via the clutch 33 in the direction of arrow e.

A belt 35 is wound around the pulleys 31 and 34.

Here, the relationship between the transmission of the rotational force of the transport motor 26 and the return motor 32 and the relationship between the clutches 20, 33 and the brake 22 will be described.

First, the rotational force in the direction of arrow d obtained by the transport motor 26 is transmitted to a transport system (not shown) via the pulley 28 and the belt 30, and at the same time, the input of the clutch 20 via the pulley 27, the belt 29, and the pulley 25. Transmitted to the shaft.

The input shaft and the output shaft are connected only when a predetermined current flows, such as an electromagnetic clutch, for example, such as an electromagnetic clutch, so that the rotational force is transmitted, and a predetermined current flows according to a command from a control unit (not shown). And the clutch 20 from the transfer motor 26 via the pulley 27, the belt 29, and the pulley 25.
Is transmitted to the pulley 21.

This rotational force is further transmitted from the pulley 21 to the brake 22 via the belt 24 and the pulley 23, and is also transmitted to the shaft 7 via the pulley 19.

Here, the brake 22 is fixed to a frame or the like of the device by a bracket (not shown).
For example, like an electromagnetic brake, it has a structure in which opening and braking are controlled by turning on and off the current.

Therefore, when the current to the brake 22 is turned off by a command from a control unit (not shown) and is in the released state, the rotation of the pulley 23 is guaranteed, thereby the shaft 7
Rotates, and the pickup roller 5 rotates in the direction of arrow a integrally with the shaft 7.

Then, the rotation of the shaft 7 is further transmitted to the shaft 11 via the pulley 16, the belt 20, and the pulley 17,
As a result, the feed roller 8 rotates integrally with the shaft 11 at the same speed in the same direction as the pickup roller 5 indicated by the arrow a, that is, in the direction in which the paper sheet 4 is fed out of the storage unit 1.

The predetermined current to the clutch 20 is stopped by a command from a control unit (not shown), the input shaft and the output shaft thereof are opened, and the current to the brake 22 is turned on by a command from the control unit (not shown). When switched to the braking state,
The rotation of the pulley 23 is braked, whereby the rotation of the pickup roller 5 and the feed roller 8 together with the shafts 7 and 11 is stopped.

On the other hand, the clutch 33 is connected to the input shaft and the output shaft to transmit the rotational force only when a predetermined current flows according to a signal from a control unit (not shown), similarly to the clutch 20. The pulley 34 is rotated by the return motor 32 in the direction of arrow e.

Since this torque is transmitted to the pulley 31 via the belt 35, the rotation transmitted to the pulley 31 when the brake 22 is open and the input shaft and the output shaft of the clutch 20 are open. The force is transmitted to the shaft 7 via a pulley 23, a belt 24, and a pulley 19 which are coaxially mounted, whereby the pickup roller 5 rotates integrally with the shaft 7 in a direction opposite to the direction of the arrow a.

Then, the rotation of the shaft 7 is further transmitted to the shaft 11 via the pulley 16, the belt 18, and the pulley 17,
As a result, the feed roller 8 rotates integrally with the shaft 11 in the same direction as the pickup roller 5, that is, at the same speed in the direction in which the paper sheet 4 is pushed back to the storage unit 1.

The predetermined current to the clutch 33 is stopped, the input shaft and the output shaft thereof are released, and the current to the brake 22 is turned on.
Is switched to the braking state, the rotation of the pulley 23 is braked, whereby the rotation of the pickup roller 5 and the feed roller 8 together with the shafts 7 and 11 is stopped.

When the rotational force of the transfer motor 26 is transmitted to the clutch 20, the clutch 33 is released, and when the rotational force of the return motor 32 is transmitted to the clutch 33, the clutch 20 is released. The control unit is controlled so as to be in an open state.

Next, the operation of the above-described configuration will be described with reference to FIG.

FIG. 6 is an operation time chart of the main components in FIG. 5, and S1 to S4 in the figure indicate processing steps.

<S1> As shown in FIG. 5, the topmost sheet 4 on the stage 3
When the number of sheets 4 is fed out by a control unit (not shown) in a state where is pressed against the pickup roller 5, the transport motor 26 is rotated by a signal from the control unit.

At the same time, when the clutch 20 is connected by the control unit and the brake 22 and the clutch 33 are released, the rotational force of the transport motor 26 is transmitted to the pulley 25 via the pulley 27 and the belt 29 as described above. The rotational force is transmitted to the pulley 19 via the clutch 20, the pulley 21, and the belt 24 when the clutch 20 is connected as described above.

Thereby, the pickup roller 5 is integrally formed with the shaft 7.
Rotates in the direction of arrow a, and the rotation of the shaft 7 causes the shaft 1 to rotate through the pulley 16, the belt 18, and the pulley 17.
The feed roller 8 rotates in the direction of the arrow a together with 1.

Therefore, the uppermost sheet 4 is a pickup roller 5
Is rotated forward by the frictional force with the high friction member 6 provided on the outer peripheral portion thereof, the leading end thereof is caught in the meshing portion between the feed roller 8 and the separation roller 12, and the feed roller is further rotated. As a result of the rotation of the roller 8, a feed force in the direction of arrow c is received by the frictional force with the high friction member 9 provided on the outer peripheral portion.

At this time, at the same time, the separation unit 12 is rotated on the paper sheet 4 in the direction of arrow b by a motor (not shown).
The friction force of the separation roller 12 against the paper sheet 4 is smaller than the frictional force of the high friction member 9 on the paper sheet 4. It is fed in the direction of arrow c along the guide plate portion 2.

By the way, the paper sheet 4 fed out by the rotation of the pickup roller 5 is not limited to the top paper sheet, but the paper sheets 4 come into close contact with each other due to various factors. May be fed out in a state in which they overlap.

In this case, since the separation roller 12 is slightly meshed with the feed roller 8 and the separation roller 12 is always rotating in the direction of arrow b, that is, in the direction of pushing the paper sheet 4 back to the storage unit 1, the separation roller 12 is not in the top position. The paper sheet 4 is stopped by the separation roller 12, and only the uppermost sheet, that is, the paper sheet 4 which is in direct contact with the feed roller 8, is fed in the direction of arrow c.

Accordingly, the paper sheet 4 is fed out separately from the storage section 1 one by one, and the fed paper sheet 4 is driven by a roller (not shown) driven by the transport motor 26 via the pulley 28 and the belt 30. It is conveyed to the processing system of the next step by a conveyance system including a conveyance belt and the like.

A sensor for detecting the number of sheets (not shown) is provided at the start end of the transport system and the like, and the number of sheets 4 sequentially fed as described above is detected by this sensor.

<S2> When the designated number of sheets 4 are fed out of the storage unit 1, the rotation of the pickup roller 5 and the feed roller 8 is stopped. However, since the pickup roller 5 and the feed roller 8 have a moment of inertia, the clutch 20 If only the transmission of the rotational force is stopped by releasing the rotation, the pickup roller 5 and the feed roller 8 rotate in the direction of the arrow a due to inertia, and the sheet 4 is fed out more than the designated number.

When the number of fed sheets 4 reaches the designated number, the clutch 20 is released by the control unit and the brake 22 is released.
Is switched to the braking state.

The braking force of the brake 22 is transmitted to the shaft 7 via the pulley 23, the belt 24, and the pulley 19, and further transmitted from the shaft 7 to the shaft 11 via the pulley 16, the belt 18, and the pulley 17. The rotation of the pickup roller 5 and the feed roller 8 in the a-direction is stopped integrally with the shaft 7 and the shaft 11, whereby the feeding of the paper sheet 4 is stopped.

<S3> When the feeding of the paper sheet 4 is stopped as described above, the subsequent paper sheet 4 is sandwiched in the meshing portion between the feed roller 8 and the separation roller 12.

If this paper sheet 4 is left as it is, the next paper sheet 4
May cause troubles in feeding the paper, or if the papers 4 are left undisturbed for a long time, the papers 4 may be wrinkled or curled, which may hinder the processing by the processing system in the next process. The paper sheet 4 sandwiched between the separation rollers 12 needs to be returned to the storage unit 1.

Therefore, in order to return the paper sheet 4 sandwiched between the feed roller 8 and the separation roller 12 to the storage unit 1, after the rotation of the pickup roller 5 and the feed roller 8 is stopped,
Subsequently, the return motor 32 rotates according to an instruction from the control unit.

At the same time, the brake 22 is released and the clutch 33
Is connected, the rotational force of the return motor 32 is transmitted to the shaft 7 via the clutch 33, the pulley 34, the belt 35, and the pulley 31, and further from the pulley 31 via the pulley 23, the belt 24, and the pulley 19. The power is transmitted from the shaft 7 to the shaft 11 via the pulley 16, the belt 18, and the pulley 17.

Thus, the pickup roller 5 and the feed roller 8 attached to the shaft 7 and the shaft 11 are indicated by arrows a.
Rotation in the opposite direction to the feed roller 8
The paper sheet 4 sandwiched between the paper roller 4 and the separation roller 12 is rotated in the direction opposite to the arrow c direction by the frictional force with the high friction member 9 provided on the outer peripheral part as the feed roller 8 rotates, 1 to the pickup roller 5
Friction member 6 provided on the outer peripheral portion by the rotation of
Storage unit 1 so that it is in the first storage state by frictional force with
Will be returned within.

<S4> When the sheet 4 sandwiched between the feed roller 8 and the separation roller 12 is returned into the storage section 1, the brake 22 and the clutch 33 are released, and the return motor 32 is stopped.

 At this time, the rotation of the separation roller 12 is also stopped.

During this time, the transport motor 26 is rotating, but since the clutch 20 is already in the released state, the rotational force of the transport motor 26 is limited to the transport system that transports the specified number of sheets 4 fed out as described above. Is transmitted, and thereby the designated number of sheets 4
Is transported to the processing system of the next step. Then, after the specified number of last sheets 4 have been conveyed to the processing system, the conveying motor 26
Stops, and the feeding operation ends.

[Problems to be solved by the invention]

As described above, the conventional separation and feeding device has been described.
According to this, many components such as a brake, a plurality of clutches, a pulley, and a belt are required to drive a feed roller and a pickup roller, and a space for disposing these components is required. In addition to being expensive, there is a problem that the control becomes complicated and the device becomes large.

In addition, since the transport motor is shared with the transport system, the rotational speed of the transport motor varies due to load fluctuations of the transport system, and the rotational speed of the pickup roller and the feed roller also varies. There is also a problem that it causes troubles in the processing system of the next process due to a cause such as feeding or chain running.

As one method for reducing the size and cost of the apparatus, a small and inexpensive DC motor is provided separately from the transfer motor, and the feed roller and the separation roller are moved in both forward and reverse directions by this DC motor. Although it is conceivable to rotate the DC motor, the DC motor has large fluctuations in the rotation speed due to load fluctuations, and also has extremely poor stopping characteristics. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is a low-price, easy-to-control, small-size paper sheet separation apparatus capable of stably separating and feeding out one sheet at a time. It is an object to provide a feeding device.

[Means for solving the problem]

In order to achieve this object, the present invention is arranged so as to be in pressure contact with the uppermost paper sheets deposited on a vertically movable stage provided in the storage section, and to feed out the paper sheets from the storage section A rotatable pickup roller, a feed roller disposed at the tip end of the storage section so as to rotate in conjunction with the pickup roller, and feeding a sheet fed by the pickup roller to a next portion; A separation roller that is disposed below the feed roller so as to face each other so that a part of the outer circumference of the feed roller is engaged with the feed roller, and rotates to return paper sheets other than the paper sheet directly in contact with the feed roller to the storage unit side; In the paper sheet separating and feeding device, a DC servomotor is provided, and a worm gear is attached to a rotating shaft of the DC servomotor, and a worm wheel meshing with the worm gear is provided. Is attached to the shaft of the pickup roller, and the worm gear and the worm wheel reduce and transmit power from the DC servo motor to the pickup roller, and do not transmit load fluctuation of the pickup roller to the DC servo motor. And a detecting means for detecting that the paper sheet has separated from the meshing portion of the feed roller and the separation roller, and a direction in which the pickup roller and the feed roller feed out the paper sheet via the worm gear and the worm wheel. The DC servo motor is rotated by energization so as to rotate, and based on the signal of the detecting means when the last sheet of the specified number of sheets leaves the meshing portion between the feed roller and the separation roller, the DC servo motor is rotated. To energize in the direction of reverse rotation Ri, wherein said DC servo motor is being normally rotated rapidly decelerated and a control means for controlling to stop.

(Operation)

According to the present invention having the above-described configuration, when separating and feeding out a sheet, the control means supplies electricity to the DC servo motor to rotate the sheet, and transmits the rotational force to the pickup roller and the feed roller via the transmission means. To rotate the separation roller and rotate the separation roller to separate and feed out the sheets one by one from the storage unit.

Then, based on the signal of the detection means when the last sheet of the designated number of sheets leaves the meshing portion of the feed roller and the separation roller, the control means energizes so that the DC servo motor rotates in the reverse direction, So that the DC servo motor stops rapidly decelerating while rotating forward,
Thereby, the braking is performed so that the pickup roller and the feed roller stop.

Thereafter, the pickup roller and the feed roller are rotated in reverse by further rotating the DC servo motor in a reverse direction for a certain period of time, and the paper sheet sandwiched between the meshing portions of the feed roller and the separation roller is returned to the storage section.

Therefore, according to this, the means for transmitting the rotational force of the DC servo motor as a drive source to the pickup roller is only a transmission means having a simple configuration, and many of the brakes, a plurality of clutches, pulleys, belts, etc. Since the above components are not required, the number of components can be reduced, and at the same time, the arrangement space can be reduced, so that not only can an inexpensive device be realized, but also control can be facilitated and the device can be downsized. .

Also, since the DC servo motor is not shared with the transport system,
The rotation speed of the pickup roller and feed roller does not fluctuate in response to load fluctuations in the transport system, and no idle feeding or chain running of paper sheets occurs, which hinders processing in the processing system in the next process. The paper sheet can be separated and fed stably without any trouble. Further, the DC servo motor is reversed based on the signal of the detecting means when the last sheet of the specified number of sheets leaves the meshing portion of the feed roller and the separation roller. Since the braking is performed so that the pickup roller and the feed roller are stopped by rotating, the stopping characteristics of both rollers are improved, and it is possible to prevent the paper sheet from being separated and fed out more than the specified number of sheets.

〔Example〕

 Embodiments will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a paper sheet separating and feeding apparatus according to the present invention, and FIG. 2 is a side view of the embodiment of FIG.

In the figure, 1 is a storage section, 2 is a guide plate section, 3 is a stage, 4 is a paper leaf, 5 is a pickup roller, 6 is a high friction member, 7 is a shaft, 8 is a feed roller, 9 is a high friction member, and 10 is a high friction member. Groove, 11 is a shaft, 12 is a separation roller, 13 is a groove,
14 is a holding block, 15 is a shaft, 16 and 17 are pulleys, 18
Is a belt, and these are the same components as in the prior art, so they are denoted by the same reference numerals and description thereof is omitted.

36 is a DC servo motor, 37 is this DC servo motor 36
A worm gear 38 attached to the rotating shaft of the pickup roller 5 is arranged so as to be adjacent to the pulley 16.
The worm wheel 38 is meshed with the worm gear 37.

Numeral 39 designates a sensor as a detecting means comprising a light emitting element and a light receiving element which are disposed so as to be vertically opposed in the vicinity of the feed roller 8 and the separating roller 12, and the sensor 39 is a sheet 4 which is fed out of the storage section 1. Is provided so as to detect when is separated from the meshing portion between the feed roller 8 and the separation roller 12.

FIG. 3 is a block diagram of a control system according to the present embodiment. As shown in FIG. 3, the DC servo motor 36 and the sensor 39 are connected to a control unit 40 as control means.

The DC servo motor 36 used in this embodiment has a built-in encoder and is controlled so as to rotate at a constant speed in both directions.

When the DC servo motor 36 rotates in the direction of arrow e in accordance with an instruction from the control unit 40, the rotational force is transmitted to the shaft 7 via the worm gear 37 and the worm wheel 38, and further from the shaft 7, the pulley 16, the belt 18, and Since the power is transmitted to the shaft 11 via the pulley 17, the pickup roller 5 and the feed roller 8 are integrally formed with the shafts 7 and 11, respectively, in the same direction as indicated by the arrow a, that is, the paper sheet 4 is removed from the storage section 1. It rotates at the same speed in the extending direction.

On the other hand, when the DC servo motor 36 rotates in the direction opposite to the direction of the arrow e, the rotational force of the
11 so that the pickup roller 5 and the feed roller 8 rotate integrally with the shafts 7 and 11 at the same speed in the direction opposite to the direction of the arrow a, that is, in the direction of returning the paper sheet 4 to the storage unit 1 side. It has become.

Further, the reduction ratio between the worm gear 37 and the worm wheel 38 is set to 1/10 or more, so that the rotational force from the worm wheel 38 is not transmitted to the worm gear 37.

The operation of the above-described configuration is described in conjunction with FIGS.
This will be described with reference to the drawings.

FIG. 4 is an operation time chart of main components for explaining the operation of the present embodiment, and S1 to S3 in the figure indicate processing steps.

<S1> As shown in FIG. 1, the topmost sheet 4 on the stage 3
When the specified number of paper sheets 4 are separated while being pressed against the pickup roller 5, the control unit 40 shown in FIG.
When the DC servo motor 36 rotates according to the instruction from the, the rotational force is transmitted to the shafts 7 and 11 via the worm gear 37, the worm wheel 38, the pulley 16, the belt 18, and the pulley 17, respectively, as described above. Shaft 7,11
Then, the pickup roller 5 and the feed roller 8 rotate in the direction of the arrow a, respectively.

At this time, the separation roller 12 is also rotated in the direction of arrow b by a motor (not shown) or the like.

The rotation of the pickup roller 5, the feed roller 8, and the separation roller 12 causes the paper sheet 4 to be separated from the storage unit 1 one by one and fed out.
Here, the description is omitted.

Also, the sheet 4 fed from the storage unit 1 is transported to the processing system of the next process by a transport system (not shown) driven by a transport motor (the transport motor 26 in FIG. 5) as in the conventional case. is there.

<S2> The trailing end of the last number of sheets 4 designated by the control unit 40 by the separation and feeding described above passes through the meshing portion between the feed roller 8 and the separation roller 12, and the passage is detected by a sensor.
When detected by 39, based on this, the control unit 40 supplies a current so that the DC servo motor 36 rotates in the direction opposite to the direction of the arrow e, and the DC servo motor 36 rapidly decelerates while rotating forward. Apply braking to stop. At this time, a terminal (not shown) of the DC servo motor 36 may be short-circuited, thereby generating a counter electromotive force to apply braking.

Note that the sensor 39 is previously connected to the feed roller 8 and the separation roller 12.
Is provided at a position corresponding to the length l in the feeding direction of the paper sheet 4 from the meshing portion with the paper sheet 4, and when the paper sheet 4 is fed in the direction of the arrow c, the front end thereof is detected by the sensor 39, The reverse braking may be applied by detecting that the rear end of 4 has passed the meshing portion between the feed roller 8 and the separation roller 12.

When braking is applied to the DC servo motor 36 in this manner, the feed roller 8, the pickup roller 5, and the shaft 1
1, the shaft 7, and the pulleys 16 and 17 have a moment of inertia, so that the inertial force in the direction of arrow e is generally transmitted to the worm gear 37 via the worm wheel 38, but in the present embodiment, as described above. Worm gear from worm wheel 38
Since the speed reduction ratio between the two is determined so that the rotational force is not transmitted to 37, the worm gear 38 and the DC servo motor
Only the inertial force in the direction of arrow e is generated by the inertia moment of the rotating shaft of 36, so that the feed roller 8 and the pickup roller 5 stop in a short time.

Therefore pick-up roller rather than using other transmission means
5. It is possible to prevent the paper rollers 4 of a specified number or more from being separated and fed out to the transport system due to the overrun of the feed roller 8.

<S3> Feed roller 8 and pickup roller 5 as described above
Is stopped, the separation and feeding out of the specified number of sheets 4 or more into the transport system can be prevented. At this time, the sheet 4 immediately after the last specified number of sheets 4 is separated from the feed roller 8 and the separation roller. It is in a state of being sandwiched by the meshing portion with 12.

If the paper sheet 4 is left unattended, it will hinder the next separation or feeding, or if the paper sheet 4 is left for a long time, the paper sheet 4 will be wrinkled or curled. In order to cause trouble, it is necessary to return the paper sheet 4 sandwiched between the meshing portions of the feed roller 8 and the separation roller 12 to the storage unit 1. Therefore, after the control unit 40 stops the feed roller 8 and the separation roller 12, Further, a current is supplied so that the DC servo motor 36 rotates in the direction opposite to the direction of arrow e for a certain period of time.

As a result, the rotational force of the DC servo motor 36 is transmitted to the shaft 7 via the worm gear 37 and the worm wheel 38 through the feed roller 8 and the separation roller 12, and further from the shaft 7 via the pulley 16, the belt 18, and the pulley 17. , The pickup roller 5 and the feed roller 8 rotate integrally with the respective shafts 7 and 11 in a direction opposite to the direction of the arrow a, that is, in a direction of pushing the paper sheet 4 back to the storage unit 1, As a result, the paper sheet 4 sandwiched between the meshing portions of the feed roller 8 and the separation roller 12 has a frictional force with the high friction member 9 provided on the outer circumference of the feed roller 8 and the outer circumference of the pickup roller 5. Is returned to the storage section 1 by the frictional force with the high friction member 6 provided in the storage section 1.

When the paper sheet 4 is returned to the storage unit 1, the control unit 40 stops the rotation of the DC servo motor 36, thereby stopping the rotation of the feed roller 8 and the pickup roller 5, and a series of processing ends.

In the above-described embodiment, the number of the sheets 4 can be detected by the control unit 40, but may be detected by a sensor provided in the transport system.

〔The invention's effect〕

As described above, the present invention provides a DC servomotor, attaches a worm gear to the rotating shaft of the DC servomotor, attaches a worm wheel that meshes with the worm gear to the shaft of the pickup roller, and the worm gear and the worm wheel are The power is reduced and transmitted from the DC servo motor to the pickup roller, and the load fluctuation of the pickup roller is not transmitted to the DC servo motor, and paper sheets are transmitted from the meshing portion between the feed roller and the separation roller. In addition to providing a detecting means for detecting the separation, the DC servo motor is rotated by energization so that the pickup roller and the feed roller rotate in the direction in which paper sheets are fed out via the worm gear and the worm wheel. Last By energizing the DC servo motor in the reverse rotation direction based on a signal from the detection means when the leaves are separated from the meshing portion between the feed roller and the separation roller, the DC servo motor rapidly rotates while rotating forward. And control means for performing control so as to decelerate and stop.

Therefore, according to this, the means for transmitting the rotational force of the DC servo motor as a drive source to the pickup roller is only a simple transmission means, and many components such as a brake, a plurality of clutches, pulleys, and belts are different from the conventional one. Since no components are required, the number of components can be reduced, and at the same time, the layout space can be reduced, so that an inexpensive device can be realized, control can be facilitated, and the size of the device can be reduced. Is obtained.

Also, since the DC servo motor is not shared with the transport system,
The rotation speed of the pickup roller and feed roller does not fluctuate in response to load fluctuations in the transport system, and no idle feeding or chain running of paper sheets occurs, which hinders processing in the processing system in the next process. The paper sheet can be separated and fed stably without any trouble. Further, the DC servo motor is reversed based on the signal of the detecting means when the last sheet of the specified number of sheets leaves the meshing portion of the feed roller and the separation roller. Since the braking is performed so that the pickup roller and the feed roller are stopped by rotating the roller, the stopping characteristics of both rollers are improved, and the effect of preventing the sheet from being separated and fed more than the specified number of sheets can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a paper sheet separating and feeding device according to the present invention, FIG. 2 is a side view of the embodiment of FIG. 1, FIG. 3 is a block diagram of a control system of the present embodiment, FIG. 4 is an operation time chart of main components for explaining the operation of the present embodiment, FIG. 5 is a perspective view showing a conventional paper sheet feeding device, and FIG. 6 is an operation time chart thereof. 1: Storage section, 2: Guide plate section 3: Stage, 4: Paper leaf 5: Pickup roller 6: High friction member, 7: Shaft 8: Feed roller, 9: High friction member 10: Groove, 11: Shaft 12: Separating roller, 13: groove 15: shaft, 16, 17: pulley 18: belt, 36: DC servo motor 37: worm gear, 38: worm wheel 39: sensor, 40: control unit

Claims (1)

(57) [Claims] A rotatable pickup roller disposed so as to be in pressure contact with uppermost sheets stacked on a vertically movable stage provided in a storage section, and for feeding out the sheets from the storage section; A feed roller that is disposed at the tip end of the storage section so as to rotate in conjunction with the pickup roller, and that feeds paper sheets fed by the pickup roller to the next portion; A paper sheet separation / delivery unit provided with a separation roller that is disposed so as to be opposed to each other so that a part of the outer periphery of the paper sheet meshes with the paper sheet, and rotates to return the paper sheets other than the paper sheet directly in contact with the feed roller to the storage unit side. In the apparatus, a DC servomotor is provided, a worm gear is mounted on a rotating shaft of the DC servomotor, and a worm wheel meshing with the worm gear is picked up by the pickup. Attached to a roller shaft, the worm gear and the worm wheel reduce and transmit power from the DC servo motor to the pickup roller, and do not transmit load fluctuations of the pickup roller to the DC servo motor, and A detection unit is provided for detecting that the paper sheet has separated from the meshing portion between the feed roller and the separation roller, and a pickup roller and a feed roller rotate in a direction in which the paper sheet is fed through the worm gear and the worm wheel. As described above, the DC servo motor is rotated by energization, and the DC servo motor is reversely rotated based on a signal of the detection means when the last sheet of the designated number has separated from the meshing portion between the feed roller and the separation roller. Direction, the DC Control means for controlling the motor so as to be rapidly decelerated and stopped while rotating forward.